Power driven pencil and ink eraser



Sept. 16, 1969 R. PAscuLLl POWER DRIVEN -PENCIL AND INK ERASER Filed Aug. 16, 1967 INVENTOR RAFFAELE PASCU LL( BY MM@ ATTORNEYS United States Patent O 3,466,687 POWER DRIVEN PENCIL AND INK ERASER Raffaele Pasculli, 8 Via Lazzaroni, Milan, Italy Filed Aug. 16, 1967, Ser. No. 661,029 Claims priority, application Italy, Aug. 18, 1966, 19,079/ 66 Int. Cl. B431 19/00 U.S. Cl. -3.53 3 Claims ABSTRACT 0F THE DISCLOSURE A power driven pencil and ink eraser comprising a rotating eraser, a gas driven turbine, a body supporting said turbine and eraser, a hollow handle removably secured to said body and a pressurized gas bottle removably housed in said handle to provide a gas supply for driving said turbine and eraser.

BACKGROUND T his invention relates to improvements in power driven erasers as generally used for erasing writing, drawing, typewriting and similiar uses.

iSeveral power driven erasers having a rotary erasing tool have been heretofore disclosed. Such known erasers are subject to many objections, such as the limitation of requiring a connection to an external source of power.

SUMMARY The eraser of this invention comprises a body wherein the source of rotary motion is located, and a handle forming container wherein the source of energy supplying said source of motion is replaceably housed. The source of motion preferably consists of a gas fed turbine, and said source of energy consists of a small sized bottle wherein pressurized gas is stored. The device comprises further control means for operator-controlling the supply of energy to the source of motion, said control means preferably consisting of valve means located along a duct connecting the bottle outlet to a nozzle positioned to direct a gaseous jet upon the turbine vanes.

Other features and advantages of the present invention will become more readily apparent from the following description and the accompanying illustrative drawing, wherein:

DRAWING FIGURE 1 is a longitudinal sectional view illustrating a power driven eraser as constructed according to an embodiment of the present invention.

FIGURE 2 is a longitudinal sectional view illustrating a power driven eraser as constructed according to another embodiment of the present invention.

lFIGURE 3 is a longitudinal sectional view illustrating a power driven eraser as constructed according to the preferred embodiment of the present invention.

FIGURE 4 is a side elevational view of the power driven eraser as shown in FIG. 3.

DETAILED DESCRIPTION Referring now to the FIG. 1 of the drawing, the power driven eraser according to a rst embodiment of the present invention comprises a compound body comprising a hollow handle forming container 1, to which is secured a substantially ellipsoid-shaped head 2, having its major axis suitably sloping in comparison with the handle axis. In such head 2 of the body a source of motion, for example an electric motor 3, is housed and has its driving shaft 4 protruding through the bore 5 out of said head 2 of the body, the protruding portion of said shaft having a circular shaped eraser 6 drivably secured thereto for ICC rotation therewith. The electric motor 3 is fed by two dry electric series connected batteries 7 and 8 which are housed in the container 1 and which can be replaced upon removal of a cover 9, suitably iitted to the container lower end. Said cover 9 carries a contact spring 10 abutting against, and electrically connecting to the metal casing and to the motor, the metal end on battery 7 of said batteries. The other end of the series connected batteries 7 and 8 is operatively engageable by a spring 11, which is electrically connected to the motor and controlled in its movements by means of a pu'sh button 12.

The power driven eraser as shown in FIG. 2 is similar to this of the embodiment hereinbefore illustrated and comprises a body having a head 102 in which the source of motion 103 is housed. Said source of motion 103 has a driving shaft protruding through the bore 105 out of the body head 102, in order to drive and Isupport a circular shaped eraser 106 for rotation therewith. In this embodiment however the body is formed by two removably connected components, namely an upper component 101 and a lower component |113, said upper component comprising two holes 11S in which the electrical plug 114 of a rechargeable battery, which forms said lower component 113, can be inserted. In this case too, the electrical connection between said plug 114 and said motor 103 is carried out by means of a `spring 111 operator-controlled by a push-button 1-12.

In FIGURES 3 and 4 there is shown the preferred embodiment of the present invention, .in which said source of motion consists of a fluid propelled motor means, namely a gas driven turbine. The eraser comprises a body formed by a hollow handle 201 and a substantially ellipsoid-shaped head 202 as illustrated with reference to the preceding embodiments of the invention, said head including a sealed chamber in which the gas fed turbine is housed. Said gas fed turbine, which as individually considered is conventionally constructed, has a driving shaft 204 protruding through the bore 205 out of said head 202 of the body and drivably supporting the circular shaped eraser 206. In the hollow handle 201 is housed a pressurized gas containing bottle 218, of a known type, which can be removably located in said handle 201 detachably connected to the head 202, in order to allow the replacement of the exhausted bottle. The pressurized gas bottle 218 comprises a conventionally constructed valve means adapted to be controlled in its opening and closing movements by means of a stern 'secured to an operator-controlled push button 212, which is movably connected to the head 202 of the body. In such a way it is possible to control said conventionally constructed valve means, which is located along a duct 216 connecting the bottle outlet to a nozzle positioned in the turbine chamber of the head 202, to direct a gaseous jet upon the turbine vanes.

The turbine housingchamber ofthe head 202 comprises further an outwardly directed outlet duct by which the exhausted turbine gas is fed through a nozzle 217, suitably directed toward the eraser 206 and in particular toward the tangency zone between the eraser and the paper, in order to take away the erasure and/or paper particles from the erased surface While it is being erased.

I claim:

1. A power driven pencil and ink eraser comprising in combination, an elongated body shaped for hand gripping thereof, a source of rotary motion located in said body, a source of energy supplying said source of motion located in said body, control means for operator-controlling the Isupply of energy to the 'source of motion and having an operator actuated part externally of said body, a rotating shaft operatively connected to the source of rotary motion outwardly extending of said body, a circular shaped eraser means txed to the extending part of said rotating shaft drivedly secured thereto for rotation therewith, said body comprising a head portion and a handle portion, said source of rotary motion being disposed in said head portion and said source of energy being disposed n said handle portion, said source of rotary motion comprises a member rotatably movable around an axis which forms with the axis of said handle portion of the body an angle different than 90, said rotating member being rotatably connected to a 'shaft outwardly extending from said head portion of the body in such a way to form with the axis of said handle portion of the body an angle greater than 90.

2. A power driven pencil and ink eraser comprising in combination, an elongated body shaped for hand gripping thereof, a source of rotary motion located in said body, a source of energy supplying said source of motion located in said body, control means for operator-controlling the supply of energy to the source of motion and having an operator actuated part externally of said body,

a rotating shaft operatively connected to the source of rotary motion outwardly extending to said body, a circular shaped eraser means xed to the extending part of said rotating shaft drivably secured thereto for rotation therewith, said body comprising a head portion and a handle portion, said source of rotary motion being disposed in said head portion and said source of energy being disposed in said handle portion, said source of rotary motion consists of a gas fed turbine housed in said head portion of the body and said source of energy consists of a small sized bottle wherein pressurized gas is stored, housed in said handle portion of the body, and said handle portion of the body is removably secured to said head portion for allowing replacement of the bottle housed therein.

3. A power driven pencil and ink eraser comprising in combination, an elongated body shaped for hand gripping thereof, a source of rotary motion located in said body, a source of energy supplying said source of motion located in said body, control means for operator-controlling the lsupply of energy to the source of motion and having an operator actuated part externally of said body, a rotating shaft operatively connected to the source of rotary motion outwardly extending of said body, a circular shaped eraser means fixed to the extending part of said rotating shaft drivably secured thereto for rotation therewith, said body comprising a head portion and a handle portion, said source of rotary motion being disposed in said head portion and `said source of energy being disposed in said handle portion, said source of rotary motion consists of la gas fed turbine housed in said head portion of the body and said source of energy consists of a small sized bottle wherein pressurized gas is stored, housed in said handle portion of the body, said gas fed turbine being housed in a sealed chamber arranged in said head portion of the body, said sealed chamber comprising an inlet duct directed toward the turbine vanes to rotary drive said gas fed turbine, and an outlet duct directed toward said eraser means in order to take away the erasure and/or paper particles from the erased surface while it is being erased, and operator-controlled valve means in said inlet duct.

References Cited UNlTED STATES PATENTS D. 186,922 12/1959 Streich et al 15-3.53 X 463,619 11/1891 Burdick 15-3.53 X 2,079,356 5/1937 Lukowski l5-3.53 3,183,891 5/1965 MacDonald 15-3.53

FOREIGN PATENTS 73 0,840 3/1966 Canada.

EDWARD L. ROBERTS, Primary Examiner U.S. C1. X.R. 15-23 

